Whois & Analysis for postcron.com

LinkedIn is a business and employment-oriented social networking service that operates via websites and mobile apps.

Founded on December 28, 2002, and launched on May 5, 2003, it is mainly used for professional networking, including employers posting jobs and job seekers posting their CVs.

As of 2015, most of the company's revenue came from selling access to information about its members to recruiters and sales professionals.

As of September 2016, LinkedIn had more than 467 million accounts, out of which more than 106 million are active.

LinkedIn allows members (both workers and employers) to create profiles and "connections" to each other in an online social network which may represent real-world professional relationships.

Members can invite anyone (whether an existing member or not) to become a connection.

The "gated-access approach" (where contact with any professional requires either an existing relationship or an introduction through a contact of theirs) is intended to build trust among the service's members.

LinkedIn participated in the EU's International Safe Harbor Privacy Principles.

Pinterest is a web and mobile application company that operates a photo sharing website.

Registration is required for use.

The site was founded by Ben Silbermann, Paul Sciarra and Evan Sharp.

Instagram is a mobile photo-sharing application and service that allows users to share pictures and videos either publicly or privately on the service, as well as through a variety of other social networking platforms, such as Facebook, Twitter, Tumblr, and Flickr.

Originally, a distinctive feature was its confining of photos to a square, similar to Kodak Instamatic and Polaroid SX-70 images, in contrast to the 4:3 aspect ratio typically used by mobile-device cameras.

In August 2015, version 7.5 was released for mobile devices, allowing users to upload media captured in any aspect ratio, but not at full size.

Users can also apply various digital filters to their images.

In June 2013, Instagram added support for videos, allowing prerecorded square standard definition resolution clips of up to 15 seconds to be shared; later updates introduced support for widescreen resolutions at 360p and longer recording times for either pre-recorded (up to one minute per video, or up to 10 minutes with a multi-video post) or disappearing live videos (up to one hour).

Twitter is an online news and social networking service where users post and interact with messages, "tweets," restricted to 140 characters.

Registered users can post tweets, but those who are unregistered can only read them.

Users access Twitter through its website interface, SMS or a mobile device app.

Twitter Inc. is based in San Francisco, California, United States, and has more than 25 offices around the world.

Facebook is an American for-profit corporation and online social media and social networking service based in Menlo Park, California.

The Facebook website was launched on February 4, 2004, by Mark Zuckerberg, along with fellow Harvard College students and roommates, Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes.